/*
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you under the Apache License, Version 2.0 (the
 *  "License"); you may not use this file except in compliance
 *  with the License.  You may obtain a copy of the License at
 *
 *    https://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing,
 *  software distributed under the License is distributed on an
 *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 *  KIND, either express or implied.  See the License for the
 *  specific language governing permissions and limitations
 *  under the License.
 */
package org.grails.gsp.jsp

import jakarta.servlet.Servlet
import jakarta.servlet.ServletContext
import jakarta.servlet.ServletRequest
import jakarta.servlet.ServletResponse
import jakarta.servlet.jsp.JspApplicationContext
import jakarta.servlet.jsp.JspEngineInfo
import jakarta.servlet.jsp.JspFactory
import jakarta.servlet.jsp.PageContext

/**
 * @author Graeme Rocher
 * @since 1.0
 */
class GroovyPagesJspFactory extends JspFactory {

    PageContext getPageContext(Servlet servlet, ServletRequest servletRequest, ServletResponse servletResponse, String s, boolean b, int i, boolean b1) {
        throw new UnsupportedOperationException()
    }

    void releasePageContext(PageContext pageContext) {
        throw new UnsupportedOperationException()
    }

    JspEngineInfo getEngineInfo() {
        return { getSpecificationVersion() } as JspEngineInfo
    }

    protected String getSpecificationVersion() { '2.1' }

    JspApplicationContext getJspApplicationContext(ServletContext servletContext) {
        def jspCtx = servletContext.getAttribute(GroovyPagesJspApplicationContext.getName())

        if (!jspCtx) {
            synchronized (servletContext) {
                if (!servletContext.getAttribute(GroovyPagesJspApplicationContext.getName())) {
                    jspCtx = new GroovyPagesJspApplicationContext()
                    servletContext.setAttribute(GroovyPagesJspApplicationContext.getName(), jspCtx)
                }
            }
        }
        return jspCtx
    }
}
